A more thorough explanation:

Definition: Territoriality is a principle in international law that states a nation has the right to govern and control its own territory. This means that a country's laws and regulations apply only within its borders, and anyone within those borders is subject to its authority. The principle of territoriality also requires that other nations respect a country's sovereignty and not interfere with its internal affairs.

Example: The United States is a good example of territoriality in action. The U.S. government has the power to make and enforce laws within its borders, and anyone who violates those laws can be punished by the U.S. justice system. However, the U.S. cannot enforce its laws in other countries, and other countries cannot enforce their laws within the U.S. This principle also applies to issues like immigration, where the U.S. has the right to control who enters and leaves its territory.

Explanation: The example of the United States illustrates how territoriality works in practice. The U.S. government has the power to govern its own territory, and other countries must respect that sovereignty. This means that the U.S. can make its own laws and enforce them within its borders, but it cannot interfere with the laws of other countries. The principle of territoriality helps to maintain order and stability in the international system by ensuring that each country has control over its own affairs.